When: 1905 CE
From Year 0 (BCE/CE): 1905
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Radiometric Dating

Iodine 131(I-131)Radioactive isotopes used for hyperthyroidism treatment are stored in Lead boxes
Iodine 131(I-131)Radioactive isotopes used for hyperthyroidism treatment are stored in Lead boxes

Radiometric Dating

5 Generations Ago

In 1905, radiometric dating was discovered. It is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes. This technique is used to date rocks. Paleontologists regularly order discoveries in chronological order and estimate their age. Knowing the age of rocks allows paleontologists to assign known values to rocks and fossils to firm up the known historical calendar.

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